円筒継手の応力集中係数について(その3)

概要

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Various semi-submersible offshore structures have been constructed, which were consist of various type of reinforced or non-reinforced tubular joints. In designing the strength of their tubular joints, it is one of the important problem to obtain the stress concentration factor (SCF) of them. For the non-reinforced tubular joints, many analytical and experimental studies had been carried out to investigate their strength, and then SCF estimation equations were presented by Kuang, Vesser, and others. On the other hand, for the reinforced joints, it is difficult to confirm the effects of stress reduction by the reinforcement members. So in designing them, large scale experiments or FEM analysis are needed to estimate SCFs for each case, but these are very expensive and not efficient. This paper presents the simple estimation method of SCF for the reinforced joints. The effect of stress reduction by the reinforcement members was translated to the effective thickness, that is a reinforced joint was translated to a non-reinforced joint which had a effective thickness and SCF was estimated by the equation for the non-reinforced joint which were inputed effective thickness.
社団法人日本船舶海洋工学会の論文
1987-03-01